Centrifugal extractor



CENTRIFUGAL EXTRACTOR A. v\ 'u' 2?/ June l0, 192%.. A 1,496,973

D. H. BENJAMIN CENTRIFUGAL EXTRACTOR Filed May 7, 1919 2 Sheets-Sheet 2 ZQZ. JO O im D iste,

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CENTRFUGL EXTMCTOR.

application ne@ may 7, wie; serial rre. essere.

To all whom t may concern:

Be it known that l, DANA H. BENJAMIN, a citizen of the United States, residing at Cleveland Heights, in the county of Cuya* hoga and State of Ghio, have invented certain new and useful Improvements in Centrifugal Extractors, of which the following is a specification.

This invention relates to centrifugal extractors, such as are used for extracting liquid from solid material, and more particularly to extractora for laundry use. i y

The invention has particular reference'to the driving means .tor rotating the extract ing basket, its object being to provide an arrangement in which the elements of the driving gearing rotate about a liked axis but the basket and the spindle supporting the same are permitted a certain amount of oscillating movement about a center, but wherein the basket is nevertheless positively driven, thereby increasing eiliciency. l

A further object of the invention is to provide extractor operating mechanism which provides for the-downward thrust of the basket upon its bearing and which is readily lubricated without liability of the lubricant flowing lto parts which might otherwise be injured thereby. 1

Further objects of the invention are i part obvious and in part will appear more in detail hereinafter.

ln the drawings, which represent one suitable embodiment ot the invention Fig. 1 a sectional elevation on the line 1-1, Fig.- 2, looking in the direction of the arrows; Fig. 2 is a sectional plan view on the line 2-2, Fig. 1; and 3 is a detail sectional view on the.` line 3 3, Fig. 2.

The extractor shown in the drawings comprises the usual outer curb or casing 1 carried by supports 2 mounted upon a suitable base 3. 4; represents the extractor basket which has an open top, is mounted beneath the opening 5 in the curb and is carried by an extractor spindle 6. rlhe basket has its peripheral portion made 'of perforated or foraminous material, such as heavy wire gauze, or sheet metal provided with a large number of small openings (only a few of which are shown), as is usual.

7 represents Ithe main driving shaft connected to a suitable source of power either directly or through suitable clutch mechanism (not shown), as may be found desirable. Said shaft is provided on its inner endv with a driving member 8 cooperatively related to a driven member 9 'rotating on a central vertical axis and provided with a sleeve portion 10 turning in a bushing 11 of the solid trame. Member 9 therefore is held to :rotate on a fixed axis in the solid' frame. Within the sleeve 10 is a shaft member 12 mounted on 'the usual step bearing disks 13 held in place by a threaded plug 14. Shaft member 12 may be secured to rotate with the driven member 9 in any suitable manner, such as by a cross pin 15.

Within said driven member said shaft supe ports one or several hardened bearinn disks 16, the upper one of which is slightly concaved to Jform a seat for a spherical or ball head 17, formed on or at'tachedto the lower end of the basket spindle 6. Said ball carries a through pin 18 whose outer ends lie in vertical slots or recesses 19 in the upper portion of the driven member 9.

The construction so far described forms essentially a universal joint connecting the driven member 9 to the basket spindle 6, because the basket spindle can oscillate a limited amount in any direction about the cen ter of the ball head 17.

To resist the tendency of the basket to tilt v to one side or the other suitable cushioning means' is employed. The means shown in the drawings comprises upper and lower rings 20 attached by bolts 21 to a series of brackets or supports 22 carried by the stationary base, rlhe drawings show 'four of such brackets, each bracket carrying two of the securing bolts 21, one of which is threadf ed downwardly through the bracket into the lower ring 20 and the other of which is threaded upwardly through the bracket-into the upper'ring 20. Surrounding the basket spindle 6 is a nonrotatable sleeve 23`having a de ending portion provided with an angular ange 24 lying midway between the upper and lower rings, as fshown in Fig. 1. Above and below said flar'i'gefymand between the same and the upper and lower ,rings are yielding rubber springs 25. This'iagr'rangement enables the basket to tilt to oneigsddeVA or the other by compression of the bumpers, but the elasticity of said bumpers always tends tov drawpthe spindle back to central position.

26 indicates an apron secured to the lower end of the member 23 and surroundi the :igieaevs upper portion of the driven member 9. oil supplied to the bearing between the nonrotatable member l23 and the shaft 6 therein, or which flows to thevuniversal joint,"

wheels, as shown, in which case cooperating driving relation may be established by shifting the shaft 7 longitudinally in its bearing, for which'purpose it is provided with an angular grooved collar 28. Members 8 and 9 may however be provided with cooperating gear teeth, in which case rotation of the shaft 'l' is started or stopped by manipulation of the clutch mechanism before referred tcD 'llhe extractor may also be provided with suitable brake mechanism preferably including a part which rotates on. a xed axis. yFor example, member 9 may be formed or provided with a brake drum 29 with which cooperates a pressure ,shoey Sllcarried by an arm 3l on a shaft 32 mounted in bearings in the frame, and which shaft at its outer end is provided with a foot treadle 33. By` depressing the treadle the shoe 30 is applied with lpressure to the brake drum and `retards the rotation of the basket. Spring 34 normally releases the brake.

lin operation it is found that the construction described enables the basket even though unevenly loadedy with a greater weight on one side than on lthe other to rst turn at low speed in askew position and subsequently, as the speed of rotation is increased to approach more and more closely a neutral axis and `finally spin on said anis.

What l claim is:-

l. An. extractor, comprising a frame, a basket, a depending spindle carr ing said basket, a non-rotatable member s eeved on said shaft, yielding means between said `memberand the frame, driving means for said spindle rotatable about a fixed axis, and an apron connected to said non-rotatable .member and lying over a portion of said driving means.,

l2. An extractor, comprising a frame, "a,

basket, a dcpending'spindle cari ing said basket, a non-,rotatable member s eeved on said shaft, yielding means between said member and the frame, a driving shaft supjoint connectingsaid driving shaft and spindle, and

an a ron connected to said non-rotatablev mem er and surrounding said shaft and joint.

3. An extractor, comprising abasket, a spindle carrying said basket, a shaft supporting said spindle and in driving relation therewith, an operating member on said shaft provided with an outer friction driving surface and a drain openlng, a sleeve sur- -rounding said spindle and having a depend-` ing apron 'extending downwardly to said operating member, and means for preventing outward travel of lubricant over said operating member to said' driving surface.

el. An extractor, comprising a basket, av spindle carrying said basket, a shaft supporting said spindle and in driving relation therewith, an operating member on said` shaft provided with a friction driving surface and a drain opening, and a`sleeve surrounding said spindle and having a depending apron extending downwardly to saidy operating member, said operating member having an upwardly extending flange forming a brake drum and an oil receiving recess.

5., lln an extractor, a drive shaft, a driven spindle, a universal driving connection between said shaft and spindle, and cushioning means for resisting oscillating movement of said spindle, said cushioning means occupying fixed position and being symmetrically arranged in a horizontal plane intersecting the center. of oscillation.

6.- lln an extractor, a drive shaft, a driven spindle, a universal driving connection between said shaft and spindle, cushioning means for resisting oscillating movement of said spindle, said cushioning means occupying xedposition and being symmetrically arranged in all directions with reference to the center of oscillation of said spinelle. y

7. Vlln an extractor, a-drive shaft, a driven spindle, a universal joint connection between said shaft and spindle, cushioning means for resisting' oscillating movement of said spindle, said means including annularly arrangedY cushioning means surrounding said universal joint and located one above and another below the center of oscillation, fixed bearing meansfor said cushioning means, and means having operative connection with said spindle extending between and co-operating with said annular cushioning means.

l8. ln an extractor, a drive shaft, a driven spindle, a universal driving connection between said shaft and spindle, annular cushioning members for resisting oscillating movement of said spindle, said cushioning members occupying fixed position and bein symmetrically arranged in a horizonta plane through the center of oscillation of said spindle. j

9. ln an extractor, a drive shaft, a driven spindle, a universal driving connection between said shaft and spindle, cushioning means V'for resisting oscillating movement of said spindle, said means including annular cushioning members surroundin said universal Vdriving connection and belng located one above and anotherbelow the center of lill oscillation, iixed bearing means for said 10. Inan extractor, a drive shaft, a driven.

spindle, la universal joint connection between said shaft and spindle, cushioning means for resisting oscillating 'movement of said'spindle, said cushioning ymeans including annularcushioning members arranged symmetrically about said universal joint, a collar loosely surrounding said spindle, fixed bearing members for said cushioning means lying above and below them, and an intermediate abutment carried by said collar and extending between said cushioning `members for engagement therewith to compress said cushioning members against said fixed bearing members.

1l. Iln anextractor, a drive shaft, a driven spindle, a universal jointconnection between 'said shaft and spindle, cushioning means for resisting oscillating movement of said spindle, said cushioning means including` annularcushioning members arranged symmetrically in all directions with reference to said universal joint, a collar loosely mounted about said spindle and provided with means for engagement with said. cushioning members, and bearing members fxedly mounted above and below said cushioning members and having enga ement therewith.

In testimony w ereof I aiiix my signature.

DANA H. BENJAMIN. 

